Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 91, NWS Buffalo, NY

August 4, 2017Niagara County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 4, 2017, 1:13 PM EDT for Niagara County, Orleans County, New York. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 4, 2017, 1:13 PM EDT (17:13 UTC)
Expired: Aug 4, 2017, 2:15 PM EDT
In force: 62 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Niagara County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 33 km from the middle of the area, began a volume at 17:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 4, 1:59 PM EDT	TSTM WND DMG	Kendall, NY	ORLEANS COUNTY SHERIFF RECEIVED REPORTS OF TREES DOWN AND POWER OUTAGES IN THE CARLTON TO KENDALL AREAS...NORTH OF RT 104. TIME ESTIMATED BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.2 hours before the alert went out and 32 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 243 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

051 
WUUS51 KBUF 041713
SVRBUF
NYC063-073-041815-
/O.NEW.KBUF.SV.W.0091.170804T1713Z-170804T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
113 PM EDT FRI AUG 4 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Niagara County in western New York...
  Orleans County in western New York...

* Until 215 PM EDT.

* At 112 PM EDT, a severe thunderstorm was located near Akron, or 9
  miles north of Clarence, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Medina, Albion, Middleport, Holley, Kent, Shelby, Clarendon and
  Gaines.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4340 7801 4313 7801 4313 7846 4309 7846
      4308 7847 4308 7850 4310 7851 4309 7852
      4309 7854 4310 7854 4309 7856 4310 7856
      4308 7857 4309 7858 4318 7859
TIME...MOT...LOC 1712Z 239DEG 33KT 4310 7852 

HAIL...1.00IN
WIND...60MPH
 
$$

Zaff

2 follow-up statements

005 
WWUS51 KBUF 041739
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
139 PM EDT FRI AUG 4 2017

NYC063-041748-
/O.CAN.KBUF.SV.W.0091.000000T0000Z-170804T1815Z/
Niagara NY-
139 PM EDT FRI AUG 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NIAGARA COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
western New York.

LAT...LON 4340 7801 4321 7801 4318 7837 4323 7844
TIME...MOT...LOC 1738Z 240DEG 30KT 4324 7828 

$$

NYC073-041815-
/O.CON.KBUF.SV.W.0091.000000T0000Z-170804T1815Z/
Orleans NY-
139 PM EDT FRI AUG 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR CENTRAL ORLEANS COUNTY...

At 138 PM EDT, a severe thunderstorm was located near Albion, moving
northeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Medina, Albion, Holley, Kent, Gaines, Kendall, Fancher and
Knowlesville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4340 7801 4321 7801 4318 7837 4323 7844
TIME...MOT...LOC 1738Z 240DEG 30KT 4324 7828 

HAIL...1.00IN
WIND...60MPH
 
$$

Zaff

124 
WWUS51 KBUF 041811 RRA
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
211 PM EDT FRI AUG 4 2017

NYC073-041821-
/O.EXP.KBUF.SV.W.0091.000000T0000Z-170804T1815Z/
Orleans NY-
211 PM EDT FRI AUG 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ORLEANS COUNTY WILL
EXPIRE AT 215 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 900 PM EDT for
western New York.

LAT...LON 4340 7801 4321 7801 4318 7837 4323 7844
TIME...MOT...LOC 1811Z 239DEG 33KT 4339 7794 

$$

Zaff

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 9:28 PM EDT	Small Craft Advisory	BUF		54 hr
Aug 4, 8:45 AM EDT	Special Weather Statement	BUF	Wayne	30 min
Aug 4, 8:52 AM EDT	Special Marine Warning	BUF		53 min
Aug 4, 11:40 AM EDT	Special Marine Warning	BUF		65 min
Aug 4, 11:53 AM EDT	Special Weather Statement	BUF	Wayne	37 min
Aug 4, 12:22 PM EDT	Special Marine Warning	BUF		53 min
Aug 4, 12:27 PM EDT	Severe Thunderstorm Warning	BUF	Erie	63 min
Aug 4, 12:55 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	50 min
Aug 4, 1:05 PM EDT	Severe Thunderstorm Warning	BUF	Genesee	31 min
Aug 4, 1:08 PM EDT	Special Marine Warning	BUF		52 min
Aug 4, 1:41 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	49 min
Aug 4, 1:59 PM EDT	Special Marine Warning	BUF		61 min
Aug 4, 3:00 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	45 min
Aug 4, 3:22 PM EDT	Special Marine Warning	BUF		53 min
Aug 4, 3:38 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	57 min
Aug 4, 3:42 PM EDT	Special Marine Warning	BUF		63 min
Aug 4, 4:02 PM EDT	Special Marine Warning	BUF		118 min
Aug 4, 4:14 PM EDT	Special Marine Warning	BUF		61 min
Aug 4, 4:17 PM EDT	Special Marine Warning	BUF		88 min
Aug 4, 4:26 PM EDT	Special Marine Warning	BUF		34 min
Aug 4, 4:27 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	33 min
Aug 4, 4:45 PM EDT	Special Marine Warning	BUF		2 hr
Aug 4, 4:46 PM EDT	Special Marine Warning	BUF		89 min
Aug 4, 5:00 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara	45 min
Aug 4, 5:04 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	41 min
Aug 4, 5:23 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	67 min
Aug 4, 5:39 PM EDT	Special Marine Warning	BUF		36 min
Aug 4, 5:51 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	54 min
Aug 4, 6:38 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	52 min
Aug 4, 7:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	66 min
Aug 4, 7:15 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Oswego, Wayne	60 min

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.